To view the real time rotatable images you need a pdb (Protein Data Bank)
viewer.
An excellent and free pdb viewer available for the
PC,
MAC and
UNIX platforms is Rasmol
(currently at version 2.5).
Basic instructions for using
Rasmol.

Now for Macintosh users! Here at MultiCHEM, we have developed
RasMac v2.5-ucb, a new version of RasMol with many
enhancements such as viewing of multiple molecules, distance/angle
measurement and more.